The full name of "Victoria's Secret" is: Virginia Code.

"Key" is more complicated to explain. The key is a parameter, which is the data input in the algorithm of converting plaintext into ciphertext or ciphertext into plaintext. .

Please refer to the introduction of Virginia password in Baidu Encyclopedia for details.

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When you use the Virginia password, you need to use the key. . . After knowing the ciphertext, you need to know the key before you can crack it against the ciphertext table. . .

Generally speaking, the person who writes the password will tell you the key.

But some don't give keys. At this time, you have to find the key yourself. The difficulty is greatly increased. There are n combinations. Try one by one and rule out one by one.

Look at some examples. I'll add them if I don't understand. . . .